Cup holding assembly for a food mixing machine

ABSTRACT

A food mixing machine ( 20 ) has an agitator ( 25 ) to mix food in a cup (C). A cup holder ( 31 ) is provided with a flexible boot ( 32 ) which receives the cup (C). The cup holder ( 31 ) is moveable through an opening ( 90 ) in the machine ( 20 ) and carries a gripping assembly ( 33 ) and an actuator assembly ( 34 ). The actuator assembly ( 34 ) is moveable relative to the gripping assembly ( 33 ) and is biased by springs ( 35 ) to maintain fingers ( 56 ) of the gripping assembly ( 33 ) in engagement with the cup (C). When it is desired to release the cup (C), a release assembly ( 80 ) overcomes the bias of the springs ( 35 ). As the cup holder ( 31 ) moves through the opening ( 90 ), the area between the cup holder ( 31 ) and the opening ( 90 ) is sealed by a seal assembly ( 91 ) so that food materials cannot go through the opening ( 90 ).

CROSS-REFERENCE TO RELATED APPLICATION

This application is a division of U.S. patent application Ser. No.12/661,399 filed Mar. 16, 2010.

TECHNICAL FIELD

This invention relates to a machine which mixes food products in a cup.More particularly, this invention relates to a cup holding assembly forsuch a machine. More specifically, this invention relates to a cupholding assembly which automatically engages the cup while the food isbeing mixed therein, and releases the cup when the mixing process iscompleted.

BACKGROUND ART

Many establishments, such as fast food restaurants or the like, mix foodproducts, such as blending condiments into soft serve ice creams,smoothies or the like, directly in the cup to be used by the customer toconsume the product. It is a time saving advantage if such machines arefully automated. In such situations, the cup is filled with the productsto be blended and is placed in a cup holder. Upon activation of themachine, the cup holder can rotate and can move upwardly to allow anagitator to be received in the cup and mix the products containedtherein. The cup holder then moves downwardly to the home position andthe machine is deactivated so that the cup can be removed from the cupholder with the food product therein being mixed and ready forconsumption.

A problem with this process is that the cup could, at times, becomedislodged from the cup holder. That is, as the cup holder and agitatorrotate, the turbulence created in the food product could cause the cupto rotate and/or wobble in the cup holder. Such could not only allowfood to spill out of the cup, but also if the turbulence is greatenough, the cup itself could come out of the cup holder. Such wouldparticularly be the case if the cup were permitted to wobble so muchthat it was engaged by the agitator thereby being easily dislodged fromthe cup holder.

An additional problem with some machines of the prior art is that foodproduct spillage can reside on the outside of the cup holder. Such couldoccur based on normal spillage of food as it is being mixed, which couldreadily happen if the cup is overfilled, or it could occur based on thewobbling of the cup previously described. If unabated, such spillage maythen run down the sides of the cup holder and into the operatingcomponents of the machine causing contamination thereto.

The need exists, therefore, for a system of holding a cup stable in acup holder and also sealing the outside of the cup holder to preventcontamination in the event of food spillage from the cup.

DISCLOSURE OF THE INVENTION

It is thus an object of one aspect of the present invention to provide afood mixing machine with a cup holding assembly that grips the cup whilefood is being mixed therein and that releases the cup when the mixingprocess is completed.

It is an object of another aspect of the present invention to provide acup holding assembly that it is provided with a seal around the exteriorperiphery of the cup holder.

These and other objects of the present invention, as well as theadvantages thereof over existing prior art forms, which will becomeapparent from the description to follow, are accomplished by theimprovements hereinafter described and claimed.

In general, a food mixing machine mode in accordance with one aspect ofthe present invention has an agitator to mix food in a cup and includesa cup holder adapted to receive the cup therein. A gripping member ispositioned within the cup holder. A gripping actuator is moveablerelative to the gripping member so that upon movement of the actuator,the gripping member selectively engages or releases the cup.

In accordance with another aspect of the invention a food mixing machineincludes a housing having an opening. A cup holder is adapted to bemoved through the opening. A seal assembly is carried by the housing andincludes a seal to engage the cup holder as the cup holder moves throughthe opening.

These aspects combine to provide a food mixing machine having anagitator to mix food in a cup and including a housing having an opening.A cup holder is adapted to receive the cup and move through the opening.A seal assembly is carried by the housing and includes a seal to engagethe cup holder as the cup holder moves through the opening. A grippingmember is positioned within the cup holder. An actuator is moveablerelative to the gripping member so that upon movement of the actuator,the gripping member selectively engages or releases the cup.

The invention also contemplates a method of mixing food in a cup with anagitator which includes the steps of placing the cup in a cup holder,moving the cup toward the agitator while at the same time gripping thecup in the cup holder, using the agitator to mix the food, moving thecup holder away from the agitator, and releasing the cup from the cupholder.

A preferred exemplary cup holder for a food mixing machine according tothe concepts of the present invention is shown by way of example in theaccompanying drawings without attempting to show all the various formsand modifications in which the invention might be embodied, theinvention being measured by the appended claims and not by the detailsof the specification.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a somewhat schematic fragmented representation of a foodmixing machine having the cup holding assembly of the present invention.

FIG. 2 is a top perspective exploded view of the components of the cupholding assembly.

FIG. 3 is a bottom perspective exploded view of the components of thecup holding assembly.

FIG. 4 is a top perspective view of the cup holder component of the cupholding assembly.

FIG. 5 is a bottom perspective view of the cup holder component of thecup holding assembly.

FIG. 6 is a perspective view of the cup gripping component of the cupholding assembly.

FIG. 7 is a perspective view of one half of the actuator component ofthe cup holding assembly.

FIG. 8 is a perspective view of the assembled cup gripping and actuatorcomponents.

FIG. 9 is a perspective view of the cup holding assembly showing the cupbroken away.

FIG. 10 is a sectional view taken substantially along line 10-10 of FIG.1.

FIG. 11 is a sectional view taken substantially along line 11-11 of FIG.1.

FIG. 12 is a sectional view taken substantially along line 12-12 of FIG.1 and showing the cup holding assembly gripping the cup.

FIG. 13 is a sectional view like FIG. 12 but showing the cup releasedfrom the cup holding assembly.

FIG. 14 is an exploded top perspective view showing the components ofthe seal for the cup holding assembly.

FIG. 15 is an exploded bottom perspective view showing the components ofthe seal for the cup holding assembly.

FIG. 16 is a sectional view taken substantially along line 16-16 of FIG.1.

PREFERRED EMBODIMENT FOR CARRYING OUT THE INVENTION

A food mixing machine is somewhat schematically shown in FIG. 1 and isindicated generally by the numeral 20. Machine 20 includes a housing 21which covers the components of the machine and which includes a lowerplatform 22, an intermediate platform 23 and an upper platform 24. Anagitator 25, shown to be in the configuration of a spoon, extendsdownwardly from upper platform 24 and is rotated by a motor (not shown)carried by one of the platforms. Agitator 25 is designed to mix foodproducts in a cup C. A travel plate 26 is moveable upwardly anddownwardly by a motor (not shown) carried by one of the platforms.Travel plate 26 also carries a shaft 27, bearings 28 and a pulley 29which is driven by a motor (not shown) carried by one of the platforms,as will hereinafter be described in more detail. Reference is made toU.S. patent application Ser. No. 12/460,273 filed Jul. 17, 2009 forwhatever details are necessary for the complete understanding of atypical machine 20 and its operation.

Travel plate 26 carries a cup holding assembly generally indicated bythe numeral 30. The basic components of cup holding assembly 30 areshown in FIGS. 2 and 3 and include a cup holder generally indicated bythe numeral 31 and made of a rigid plastic material, a flexible boot 32made of a rubber-like material, a cup gripping assembly generallyindicated by the numeral 33, and a gripping actuator assembly generallyindicated by the numeral 34 and shown to be in two pieces. As willhereinafter be described in more detail, cup holder assembly alsoincludes a plurality of springs 35 and its components are held togetherby a bolt 36 which receives a nut 37.

The construction of cup holder 31 is probably best shown in FIGS. 4 and5 and includes a generally cylindrical sidewall 40 being open at itstop, where a flange 41 is formed, and open at its bottom 42. A shelf 43is formed near the open bottom 42 and includes a central aperture 44 andopposed sockets 45 radially spaced from central aperture 44. Four slots46 are formed at the periphery of shelf 43 and are spaced ninety degreesof each other. Slots 46 also extend slightly up sidewall 40. A boss 47is formed under central aperture 44 of shelf 43, and bosses 48 are alsoformed under sockets 45. In addition, socket bosses 49 are formed on thebottom of shelf 43 and are positioned radially outward of bosses 48.

As best seen in FIG. 6, cup gripping assembly 33 includes a central hub50 having an aperture 51 therethrough. A base 52 extends outwardly fromhub 50 and carries four arms, generally indicated by the numeral 53,which extend upwardly from base 52 evenly spaced at ninety degreesaround hub 50. A living hinge 54 is formed at the junction of each arm53 and base 52 so that arms 53 are pivotable relative to base 52. Eacharm 53 includes an outer conical surface 55 which, as will behereinafter described, is engaged by actuator assembly 34 to pivot arms53 inwardly. A finger 56 having an inwardly directed lock tab 57 isformed at the top end of each arm 53.

Actuator assembly 34 is shown as being formed from two identical halves,for ease of molding the plastic materials, but could be formed as onepiece. When formed from two halves, a pin 60 and socket 61 formed ineach half assure proper alignment of the halves which can then beattached to each other by screws (not shown) received through apertures62. When so assembled, actuator assembly 34 includes a generallycircular base 63 having an abbreviated sidewall 64 extending upwardlytherefrom. Circumferentially spaced actuator arms 65 extend upwardlyfrom sidewall 64 and are spaced approximately ninety degrees of eachother. Each arm 65 has an inwardly directed lip 66 formed near the topthereof, and each lip 66 has an inner actuating surface 67.

Cup gripping assembly 33 and actuator assembly 34 are assembled togetherand positioned in the bottom of cup holder 31 as now to be described. Asshown in FIG. 8, gripping assembly 33 is positioned within actuatorassembly 34 with its arms 53 aligned with arms 65 of actuator assembly34. For ease of such alignment, one or more of the arms 65 may beprovided with tabs 68 extending inwardly from the edges of surface 67such that an arm 53 of gripping assembly 33 will be received betweentabs 68. When so positioned, actuating surfaces 67 are adjacent to andotherwise bear against conical surfaces 55 of gripping assembly 33.

Springs 35 are inserted into socket bosses 49 of cup holder 31, and theassembled gripping assembly 33 and actuator assembly 34 are insertedinto the bottom of cup holder 31. As such, springs 35 bear against base63 of actuator assembly 34. Also, at this time, the fingers 56 of thearms 53 of gripping assembly 33 are exposed through cup holder slots 46thereby allowing fingers 56 to communicate with the inside of cup holder31. Bolt 36 is inserted through central aperture 44 of cup holder 31 andthrough aperture 51 of gripping assembly 33, and thus gripping assembly33 is attached to cup holder 31. However, actuator assembly 34 is freeto float within cup holder 31. As shown in FIGS. 12 and 13, bolt 36 isalso utilized to connect cup holding assembly 30 to travel plate 26.

In order to mix food, a cup C or other container is placed in cupholding assembly 30. While it may be placed directly into cup holder 31,preferably it is positioned into boot 32 which is, in turn, carried bycup holder 31. To that end, boot 32 is shaped like the inside of cupholder 31 and includes lugs 69 formed on the bottom thereof. Lugs 69snap into sockets 45 of cup holder 31 to hold boot 32 in place. Also,boot 32 is provided with an upper peripheral lip 70 that engages the topflange 41 of cup holder 31, as best seen in FIGS. 10-13. Fingers 56, ormore specifically lock tabs 57, bear against the boot 32 to engage thecup C within the boot. The presence of boot 32 protects the cup from anypossible damage which could be caused by fingers 56, and the presence offlexible boot 32 also accommodates cups of slightly varying sizes.

When travel plate 26 is in the up position as shown in FIG. 1 and moreparticularly in FIG. 12, food is being mixed in cup C by agitator 25. Atthe same time, cup holding assembly 30 is being rotated on shaft 27. Butcup C is prevented from rotating with the cup holding assembly becausein this position the bias of springs 35 is maintaining arms 65, and inparticular actuating surfaces 67 thereof, down or conical surfaces 55 ofgripping assembly 33 which, in turn, pushes arms 53 of gripping assembly33 inwardly, pivoting them on hinges 54. This condition is shown in FIG.12. However, when travel plate 26 moves downwardly to the FIG. 13position, indicative of the mixing process being completed, the grip oncup C is released by a release initiating assembly generally indicatedby the numeral 80 and now to be described.

As best shown in FIG. 1, release initiating assembly 80 includes abracket 81 which is attached to lower platform 22. Bracket 81 carries aplurality of upstanding posts 82 which are shown to be in the form ofscrews threaded onto the upper surface 83 of bracket 81. As travel plate26 approaches the FIG. 13 position, posts 82 will contact the bottom ofbase 63 of actuator assembly 34. Such overcomes the bias of springs 35and allows actuator assembly 34 to move relative to gripping assembly33. As such, actuating surface 67 of actuator assembly 34 moves upconical surface 55 of gripping assembly 34 which allows arms 53 to pivotaway from cup C and release the grip so that cup C can be removed fromthe cup holding assembly 30.

When the cup holding assembly 30 is moving upwardly and downwardly, itis passing through an opening 90 (FIGS. 12 and 13) formed inintermediate platform 23 or an equivalent area of housing 21. Opening 90thus provides access to the machine components that are located below itwhich is basically those components that may be on lower platform 22.Since food drippings could often accumulate on and otherwise run downthe outside of cup holder 31 and potentially pass through opening 90, aseal assembly, generally indicated by the numeral 91 and best shown inFIGS. 14-16, is provided.

Seal assembly 91 includes an elastomeric gasket 92 which is carriedbetween an upper plastic plate generally indicated by the numeral 93,and a lower plastic plate generally indicated by the numeral 94. Upperplate 93 is shown as being in the form of a ring having three bosses 95extending downwardly therefrom. The internal lower periphery 96 of thering of plate 93 receives gasket 92 which may be press fit therein. Thelower plate 94 is also ring shaped and is provided with three recesses97 which receive bosses 95 therein. Fasteners 98 are provided to holdseal assembly together with the edges of platform 23 at aperture 90sandwiched therebetween as shown in FIG. 16. As shown there, gasket 92extends into the aperture 90 so that it bears against cup holder 31 asit passes therethrough. The edges of the housing platform are heldbetween the upper plate 93 and the lower plate 94 by virtue of theattachment by fasteners 98.

In light of the foregoing, it should thus be evident that a food mixingmachine constructed as described herein substantially improves the artand otherwise accomplishes the objects of the present invention.

What is claimed is:
 1. A machine using a rotating agitator to mix foodin a cup comprising a housing, an opening in said housing, a cup holderadapted to receive the cup and to be moved through said opening, and aseal assembly carried by said housing around said opening, said sealassembly including a seal to engage said cup holder as said cup holdermoves through said opening.
 2. The machine of claim 1 wherein edgesdefine said opening, said seal assembly engaging said edges.
 3. Themachine of claim 2 wherein said seal is a gasket and said seal assemblyincludes a first plate carrying said gasket, a second plate, and meansto attach said first plate to said second plate with said gasket andsaid edges between said first and second plates.
 4. The machine of claim1 further comprising a gripping member positioned with said cup holder,and an actuator moveable relative to said gripping member so that saidgripping member can selectively engage a cup positioned in said cupholder.